bona fides
Concise Oxford English Dictionary © 2008 Oxford University Press:
bona fides /ˌbəʊnə ˈfʌɪdiːz/
▶noun
- 1 honesty and sincerity of intention.
- 2 [treated as pl.] informal a person's credentials.
– origin L., lit. ‘good faith’.
'bona fides' also found in these Oxford entries:

